Can't see the wood for the 3D

How's this for repurposing? Researchers at Chalmers University of Technology in Sweden have taken the biopolymer cellulose extracted from wood and used it as the ink in their 3D printer to create three-dimensional objects of precise shape and structure but with a natural twist. By using carbon nanotubes, or other functional materials, as an additive they can also endow these woody objects with electrical conductivity and perhaps other properties. "Combing the use of cellulose to the fast technological development of 3D printing offers great environmental advantages," explains Chalmers' Paul Gatenholm. "Cellulose is an unlimited renewable commodity that is completely biodegradable."